US7485135B2 - Device for fixing surgical implants - Google Patents

Device for fixing surgical implants Download PDF

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Publication number
US7485135B2
US7485135B2 US10/382,868 US38286803A US7485135B2 US 7485135 B2 US7485135 B2 US 7485135B2 US 38286803 A US38286803 A US 38286803A US 7485135 B2 US7485135 B2 US 7485135B2
Authority
US
United States
Prior art keywords
shaft
rivet
hole
closing element
extending
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/382,868
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English (en)
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US20030199877A1 (en
Inventor
Peter Steiger
Robert Frigg
Lukas Eschbach
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Synthes USA LLC
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Synthes USA LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Assigned to SYNTHES reassignment SYNTHES ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ESCHBACH, LUKAS, FRIGG, ROBERT, STEIGER, PETER
Publication of US20030199877A1 publication Critical patent/US20030199877A1/en
Application granted granted Critical
Publication of US7485135B2 publication Critical patent/US7485135B2/en
Assigned to SYNTHES USA, LLC reassignment SYNTHES USA, LLC CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: SYNTHES (U.S.A.)
Expired - Fee Related legal-status Critical Current
Adjusted expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically
    • F16B19/1027—Multi-part rivets
    • F16B19/1036—Blind rivets
    • F16B19/1045—Blind rivets fastened by a pull - mandrel or the like
    • F16B19/1054—Blind rivets fastened by a pull - mandrel or the like the pull-mandrel or the like being frangible
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064—Surgical staples, i.e. penetrating the tissue
    • A61B17/0642—Surgical staples, i.e. penetrating the tissue for bones, e.g. for osteosynthesis or connecting tendon to bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/064—Surgical staples, i.e. penetrating the tissue
    • A61B2017/0647—Surgical staples, i.e. penetrating the tissue having one single leg, e.g. tacks

Definitions

  • the invention relates to a device for the treatment of fractures of bones and/or for fixing surgical implants, surgical threads, or tissues in or on the bone.
  • rivets in particular blind rivets
  • rivets with closing heads formed of separate anchoring tongues spread relatively wide.
  • Such blind rivets are disclosed in the non-medical area, e.g. in UK Patent Application No. GB 2,054,082 to Tucker Fasteners.
  • the anchoring tongues are formed by axial tearing of the wall of the rivet shaft at the front end of the blind rivet by means of a pyramid-shaped, sharp-edged closing head which is drawn into the hollow cylindrical rivet shaft from the front end.
  • At least one disadvantage of these types of blind rivets is their limited application to soft materials and the necessity of high closing forces for forming the closing head on the blind rivet.
  • the present invention generally relates to a device comprising a closing element with a shaft and at the end position a head which is fixedly connected to the shaft or, for example, can be connected by means of a thread connection, to the shaft, and a rivet which comprises, coaxial to a central axis, a rivet shaft and a through-hole coaxially penetrating the rivet.
  • the shaft of the closing element can be displaced coaxially in the through-hole so that the head can be brought axially to lie at the front shaft end.
  • the head and shaft of the closing element can be structured in two parts or as one part.
  • the rivet shaft includes two grooves which extend from the front shaft end parallel to the central axis over a length L in the direction of the rear end of the rivet. The grooves serve as theoretical break points so that on further displacement of the closing element in the direction of the rivet head the rivet shaft is divided by the head of the closing element into anchoring tongues on a part of its overall length.
  • the ratio of the length L to the overall length of the rivet shaft is between 20% and 90%.
  • the rivet shaft includes at least one slot, each slot having a first end intersecting the front shaft end and extending into the through-hole and a second end extending parallel to the central axis into a groove.
  • the rivet includes at its rear end a rivet head which can be fixedly connected to the rivet or, for example, can be connected to the shaft by means of a thread connection.
  • the characteristic values of the rivet material lie within a range of the ratio of tensile strength to elongation at break of 10:1 to 50:1, preferably 10:1 to 30:1.
  • the geometric dimensions of the rivets are chosen so that the ratio of the outer diameter da of the rivet shaft to the diameter d of the through-hole lies in a range from 1.1:1 to 2.5: 1, preferably from 1.5:1 to 2:1.
  • the ratio of the radial depth t of the grooves to the wall thickness of the rivet shaft lies suitably in a range from 1:1.2 to 1:2.5, preferably from 1:1.7 to 1:2.3.
  • the wall thickness can be determined from the difference of the outer diameter da and the diameter d.
  • FIG. 1 is a top view of the device according to the invention
  • FIG. 2 is a longitudinal cross-sectional view through the embodiment of the device according to the invention represented in FIG. 1 ,
  • FIG. 3 is a cross-sectional view taken along line I-I of FIG. 2 ,
  • FIG. 4 is a perspective view of the device of FIGS. 1 to 3 .
  • FIG. 5 is a perspective view of the device of FIGS. 1-4 in the closed state.
  • FIGS. 6A and 6B are left and right side longitudinal cross-sectional views, respectively, of another embodiment of the device according to the invention.
  • FIG. 7 is a perspective view of the device of FIGS. 6A and 6B .
  • the rivet 2 has a central axis 6 and comprises a cylindrical rivet shaft 3 running parallel to the central axis 6 .
  • the cylindrical rivet shaft is not necessarily required to be circularly cylindrical.
  • a rivet head 4 is fixedly connected to the rivet shaft 3 , and a cylindrical through-hole 5 penetrates the rivet 2 coaxially along the central axis 6 .
  • the rivet shaft 3 has an outer diameter da and includes grooves 9 which run parallel to the central axis 6 , and extend from the front shaft end 7 over a length L, and have a depth t from the outer circumferential surface 14 .
  • the depth t is determined so that the wall thickness, defined by the diameter da and d and the depth t, on closing of the rivet 2 with the closing element 1 allows a separation of the rivet 2 into separate anchoring tongues 13 ( FIG. 5 ) on the part to be closed.
  • the number of anchoring tongues 13 corresponds to the number of grooves 9 introduced on the outer circumferential surface 14 of the rivet 2 .
  • the grooves serve as theoretical break points so that on further displacement of the closing element in the direction of the rivet head the rivet shaft is divided by the head of the closing element into anchoring tongues on a part of its overall length.
  • the ratio of the length L to the overall length of the rivet shaft may be between 20% and 90% so that the anchoring tongues can expand radially to a surface F which can be 3 to 20 times the cross-sectional surface of the rivet shaft.
  • the number of the grooves distributed uniformly on the circumference of the rivet shaft may be in a range of 3 to 8, preferably 3 to 5. From the number of grooves the number of anchoring tongues in the fixed rivet also follows.
  • the wall thickness of the rivet shaft 3 corresponds to 14% of the outer diameter da.
  • slots 12 penetrate into the rivet shaft 3 parallel to the central axis 6 .
  • the slots run, on one side, at the front shaft end 7 into the through-hole 5 and, on the other side, parallel to the central axis 6 into the grooves 9 .
  • the closing element 1 comprises a shaft 10 parallel to the central axis 6 and at the end position a head 11 is disposed which runs in the form of a wedge into the shaft 10 .
  • the closing of the rivet 2 is accomplished after the introduction of the rivet 2 , e.g. into a bone plate and a bone (not represented) by means of the closing element 1 .
  • the head 11 of the closing element 1 has a diameter D which is greater than the diameter d of the through-hole 5 so that the head 11 of the closing element 1 is pressed into the inner cone 8 ( FIG. 2 ) of the through-hole 5 by means of a tractive force exerted on the shaft 10 .
  • On pressing the widening wedge-like head 11 of the closing element 1 into the inner cone 8 FIG.
  • the wall 20 ( FIG. 2 ) of the rivet shaft 3 is expanded and on further pressing of the head 11 of the closing element 1 separated into the anchoring tongues 13 ( FIG. 5 ) at the theoretical break points formed by the grooves 9 .
  • the rivet 2 comprises a central axis 6 , a circularly cylindrical rivet shaft 3 with a front shaft end 7 intersecting the central axis 6 , and at its rear end 18 intersecting the central axis 6 at the end position a rivet head 4 , also circularly cylindrical.
  • a front shaft end 7 there is a front apical face 15 perpendicular to the central axis 6 .
  • the rivet head 4 runs against the front shaft end 7 directed convexly or tapering in the form of a wedge into the rivet shaft 3 and also convexly or tapering in the form of a wedge into the rear apical face 19 of the rivet 2 .
  • the rear apical face lies at the end position at its rear end 18 .
  • a through-hole 5 penetrates coaxially to the central axis 6 and the rivet 2 from the front shaft end 7 up to the rear end 18 .
  • the through-hole 5 runs at the front shaft end 7 with the inner cone 8 expanding into the front apical face 15 .
  • grooves 9 are introduced which penetrate from the front shaft end 7 up to a length L ( FIG.
  • slots 12 penetrate into the rivet shaft 3 from the front apical face 15 also parallel to the central axis 6 .
  • These slots 12 have a rectangular cross-section ( FIG. 1 ) perpendicular to the central axis 6 and have a wedge-like structure parallel to the central axis 6 .
  • the slots 12 run parallel to the central axis 6 and run into the front apical face 15 , into the outer circumferential surface 14 , and into the grooves 9 . The tearing of the rivet shaft is promoted by these slots.
  • At least one of the slots extends from a first end intersecting with the corresponding groove and extending toward the front end of the shaft tapering through a thickness of the shaft toward the central axis to open into the through-hole.
  • FIG. 5 shows the rivet 2 with central axis 6 , rivet head 4 , expanded rivet shaft 3 , and closing element 1 in the closed state of the rivet 2 .
  • the rivet shaft 3 is expanded to the length L ( FIG. 1 ) and comprises three anchoring tongues 13 .
  • the rivet may have the following geometric dimensions: the outer diameter da of the rivet shaft may be 2 to 12 mm, preferably 3 to 8 mm; diameter d of the through-hole may be 1 to 8 mm, preferably 1.5 to 5 mm; wall thickness of the rivet shaft may be 0.2 to 4 mm, preferably 0.5 to 2 mm; and radial depth t of the grooves may be 0.1 to 3 mm, preferably 0.2 to 1 mm.
  • the geometric dimensions of the rivets are selected so that the ratio of the outer diameter da of the rivet shaft to the diameter d of the through-hole is in a range from 1.1:1 to 2.5:1, preferably from 1.5:1 to 2:1.
  • the ratio of the radial depth t of the grooves to the wall thickness of the rivet shaft may be in a range from 1:1.2 to 1:2.5, preferably from 1:1.7 to 1:2.3.
  • the wall thickness can be determined from the difference of the outer diameter da and the diameter d.
  • the grooves may have a triangular cross-section perpendicular to the central axis where the apical angle of the triangle in the base of the groove lies within a range of 30° to 80°, preferably of 40° to 70°.
  • the rivet material is preferably metallic and may include the following materials or alloys: a) materials based on iron, preferably steel, b) materials based on titanium, preferably Ti CP and titanium alloys, c) materials based on cobalt, preferably cobalt alloys, d) materials based on tantalum, preferably tantalum alloys, and e) materials based on zirconium, preferably zirconium alloys.
  • the rivet may be made from a material having the following physical properties or characteristics: the ratio of tensile strength (Rm in N/mm2) to elongation at break (A5 in %) is between 10:1 to 50:1, preferably between 10:1 to 30:1.
  • FIGS. 6A , 6 B, and 7 another embodiment of the rivet 2 is represented which is distinguished from the forms of embodiment represented in FIGS. 1 and 2 in that the rivet 2 ′ includes no rivet head 4 ( FIGS. 1 and 2 ) at its rear end 18 ′. Furthermore, the closing element 1 ′ penetrates the rivet 2 ′ only on a part of its overall length and is structured with a hole 21 penetrating the closing element 1 ′ coaxially. The hole is provided at its end 22 lying axially opposite the head 11 ′ with a coaxial inner thread 23 . A Kirschner wire 24 can be screwed into this inner thread and can be screwed out of the inner thread 23 once again after the closing of the rivet 2 ′.
US10/382,868 2000-09-07 2003-03-07 Device for fixing surgical implants Expired - Fee Related US7485135B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2000/000478 WO2002019931A1 (de) 2000-09-07 2000-09-07 Vorrichtung zur fixierung von chirurgischen implantaten

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/CH2000/000478 Continuation WO2002019931A1 (de) 2000-09-07 2000-09-07 Vorrichtung zur fixierung von chirurgischen implantaten

Publications (2)

Publication Number Publication Date
US20030199877A1 US20030199877A1 (en) 2003-10-23
US7485135B2 true US7485135B2 (en) 2009-02-03

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US10/382,868 Expired - Fee Related US7485135B2 (en) 2000-09-07 2003-03-07 Device for fixing surgical implants

Country Status (10)

Country Link
US (1) US7485135B2 (de)
EP (1) EP1315462B1 (de)
JP (1) JP4215502B2 (de)
CN (1) CN1221218C (de)
BR (1) BR0017331A (de)
CA (1) CA2422464C (de)
DE (1) DE50015692D1 (de)
ES (1) ES2326784T3 (de)
MX (1) MXPA03002015A (de)
WO (1) WO2002019931A1 (de)

Cited By (10)

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US20100211071A1 (en) * 2009-02-13 2010-08-19 Lettmann Jason W Methods and devices for treating hallux valgus
US20110077656A1 (en) * 2009-09-25 2011-03-31 Sand Paul M Methods and devices for treating a structural bone and joint deformity
US20110178557A1 (en) * 2010-01-21 2011-07-21 Rush Shannon M Methods and devices for treating hallux valgus
US20110301648A1 (en) * 2010-06-03 2011-12-08 Trevor Lofthouse Methods and Devices for Treating Hallux Valgus
US20140026632A1 (en) * 2012-07-27 2014-01-30 Gesipa Blindniettechnik Gmbh Connection element and setting device for a connection element
US8652136B2 (en) 2011-08-15 2014-02-18 Zimmer, Gmbh Femoral fracture fixation device
US20140163624A1 (en) * 2011-08-02 2014-06-12 NLT-Spine Ltd. Bone Screw with Deflectable Portion
US9138219B2 (en) 2010-12-29 2015-09-22 Tarsus Medical Inc. Methods and devices for treating a syndesmosis injury
US9750552B2 (en) 2009-07-06 2017-09-05 DePuy Synthes Products, Inc. Expandable fixation assemblies
US10940016B2 (en) 2017-07-05 2021-03-09 Medos International Sarl Expandable intervertebral fusion cage

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JP5204755B2 (ja) 2006-03-20 2013-06-05 カイエン メディカル インコーポレイテッド 材料固定のための装置、システム、及び方法
WO2008073588A2 (en) 2006-10-24 2008-06-19 Cayenne Medical, Inc. Methods and systems for material fixation
GB2457740A (en) * 2007-10-08 2009-08-26 Mohamed Khalid A bone fastener for use in securing an intramedullary fixation device
US8858565B1 (en) 2008-05-08 2014-10-14 Cayenne Medical, Inc. Inserter for soft tissue or bone-to-bone fixation device and methods
US8123806B1 (en) 2008-05-09 2012-02-28 Cayenne Medical, Inc Method of tensioning a tissue graft having suture bundles using a cleated bar
KR20110033199A (ko) * 2008-06-19 2011-03-30 신세스 게엠바하 뼈 스크류 퍼처스 증강 임플란트, 시스템 및 기술
US8206446B1 (en) 2009-03-10 2012-06-26 Cayenne Medical, Inc. Method for surgically repairing a damaged ligament
JP2013538591A (ja) 2010-05-26 2013-10-17 トップスフィールド メディカル ゲーエムベーハー 移植用人工関節
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CA2422464C (en) 2008-10-28
CA2422464A1 (en) 2003-03-07
JP2004507332A (ja) 2004-03-11
US20030199877A1 (en) 2003-10-23
BR0017331A (pt) 2003-06-03
CN1479591A (zh) 2004-03-03
DE50015692D1 (de) 2009-08-27
EP1315462B1 (de) 2009-07-15
MXPA03002015A (es) 2003-07-24
ES2326784T3 (es) 2009-10-20
CN1221218C (zh) 2005-10-05
EP1315462A1 (de) 2003-06-04
JP4215502B2 (ja) 2009-01-28
WO2002019931A1 (de) 2002-03-14

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